Fourths to george thomas mclauthlin



No Model.) 2 SheetsSheet 1.

J, NAYLOR, Jr.

SPEED RECORDER Patented Dec. 11,1894;

(No Model.) 2 Sheets-Sheet 2.

J. NAYLOR, Jr.

SPEED RECORDER.

No. 530,710. Patented Dec. 11,1894.

UNITED STATES PATENT OFFICE JAMES NAYLOR, JR, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF THREE- FOURTHS TO GEORGE THOMAS MCLAUTHLIN, OF SAME PLACE.

SPEED-RECORDER.

SPECIFICATION forming part of Letters Patent No. 530,710, dated December 11, 1 894.

Application filed December 15,1893. Serial No. 493,789. (No model.)

To all whom it may concern.-

Be it known that I, JAMES NAYLOR, J r., a citizen of the United States, and a resident of Boston,in the county of Suflfolk and State of Massachusetts, have invented new and useful Improvements in Speed-Recorders, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to an instrument for making a continuous and legible record of speed and its variations upon a paper blank; and it consists primarily of the means whereby the existing condition of the speed is communicated to a marking point upon said paper blank; said means consisting essentially of a liquid acted upon by the speed to be recorded in such manner that its elevation is coincident with said speed; and mechanism from the varying surface level of the said liquid to a marking point to move it upon the face of a record blank in accordance with the speed and its variations; together with such construction and operation of parts as is necessary to eifect the delicate results as will be hereinafter fully described and set forth in the claims.

In the drawings, Figure 1 is a front elevation of my invention; Fig. 2, an end elevation; Fig. 3, a cross section, and Figs. 4, 5 and 6 detail views.

A represents a shelf upon which the whole instrument is mounted and which may be secured to awall by brackets or arranged inside of a case.

B is a continuous paper record blank upon which are printed the lines of time trans versely, said lines designating the regular time divisions of the day, and lines running longitudinally to show the normal speed and percentage above or below it. There is also a regular series of perforations along one edge of its length which serve as the mechanical equivalent of a rack.

O is a table supported by the posts 0 c c c.

D is a time movement having an exposed dial with communicating mechanism therefrom to drive the toothed feed roll D as shown in Fig. 1 the said toothed roll being supported over the surface of the table 0 by suitable bearings and held thereby from lateral movement, so that the teeth of the roll may engage the perforations of the blank to feed it over the stationary surface of the table.

E is a portable roller from which the continuous record blank is unwound, it being supported by the hangers e e and the set screw, 6'. The record blank is shown as removed from its engagement with the toothed roll so as to clearly show the table and its means of support, and is seen upon the mounted roll E in position ready to be carried up to and over the table and into engagement with the said toothed roll.

F is a U-shaped receptacle to hold the liquid, one end of which is considerably higher than the other. Within this receptacle is secured a bearing stepf, said step being supported and held central by the partitions f f f said partitions being soldered to the inside surface of the receptacle. Other means may be used for supporting the partitions and step as for instance, an internal screw thread in the receptacle and corresponding surfaces upon the ends of the partitions for insertion thereto, or the whole piece may be driven in and supported by tight contact. These partitions are made as thin as possible and of considerable depth, so as to offer the least resistance to the liquid, which construction is of great importance in the operation of the instrument.

G is an ordinary screw propeller secured to the shaft G, said shaft supported by the bearing stepfat its lower end and by the bearing box 9 at the upper part. The blades of the propeller just clear the partitions f f f, and close above said blades is another partition f secured to the receptacle and extending upward above the highest level that the liquid attains. These partitions are to hold the liquid from revolving with the shaft and propeller.

It is of the utmost importance that the blades of the propeller and the partitions above and below them be set as-close together as is possible, so as to obtain a steady record. A space of one-eighth of an inch intervening between the said propeller and the lower partitions would render the instrument so unsteady as to be useless.

'application, Serial No. 458,4.15.

G is the drive pulley secured to the shaft to which motion is communicated from the power to be recorded.

H is an air tight float provided with guide pieces h h h secured thereto and an upward extending rack bar H to engage a spur gear 11. A suitable flanged roller 11" is so arranged as to keep said rack bar in easy engagement with said spur gear and to guide it in its linear movement.

I is a horizontal rack bar supported upon and in engagement with the spur gear H" at one end and supported upon an anti-friction guide roller I at the other. A flanged guide roller 1 holds the rack in easy engagement to the gear, and a projection 2' keeps said rack from falling away from the guide roller 1'. The bar is thus given a free and easy linear movement from the gear.

Mounted upon the rack bar I is the pen holder J, it being held thereto in the same manner as shown and described in my prior It is shown at Fig. 6 said view being a side elevation of the same parts as seen in Fig. 1.

J" is a common glasstubular pen inserted into the outer end of the holder and held thereto by means of a small set screw.

J is an ink-well made of tubular glass and sealed at the lower end and also inserted into 'the outer end of the holder and in close proximity to the said pen. and secured thereto by a set screw independently of the said pen J". Ink is carried from the ink-well to the pen by means of capillary attraction, the ordinary cotton wick being used for this purpose. The pressure of the pen J upon the blank is due entirely to the superincumbent weight and is therefore termed gravity acting.

K is the inlet to supply liquid to the receptacle. K is the outlet to withdraw it whenever necessary, and K is the overflow. All

these openings are to be kept closed in operation, which is as follows:Sufficient liquid is run into the receptacle so as to show at the overflow, which determines the exact quantity required. The openings are then closed to prevent evaporation. Motion is then communicated from the power to be recorded, to the pulley G, causing the rotation of the shaft and propeller G which causes the liquid to pass from one part of the receptacle to the other according to the speed of the power communicated. The liquid is prevented from rotation by the partitions f f f andf below and above the propeller which are set in the closest proximity thereto. The extreme sensitiveness of this improvement is due entirely to the close set of the propeller and partitions; and according to the speed, the liquid levels are changed in a degree more apparent than the variations which caused such. The liquid is raised by the motion of the propeller into the long extension of the receptacle; causing a corresponding depression in the other, upon the surface of which rests the float H which is connected to, and turns the spur gear II" as the varying liquid level affects its altitude. This variable motion is given to the horizontal bar from the spur gear and which gives the same motion to the marking point. It should be observed that the movements of all parts connecting the float and marking pen are all positively connected. A movement of either will affect the other in either direction. Meanwhile the time movement is imparting motion to the toothed feed roll D, which engages the perforated paper record blank B as shown and described in my previous application, Serial No. 458,415, and said blank is being fed over the surface of the table 0. Its operation is now automatic. All that is essential is to keep the time movement running; and a prefect record of the speed is made, including all stops and starts.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

'1. In a speed recorder the combination with a time movement and connecting mechanism therefrom to a toothed feed roll, and said roll; of a mounted and driven propeller, stationary partitions in close proximity above and below it, a contained liquid and a float thereon, connecting mechanism therefrom to a marking point and said marking point as herein set forth.

2. In a speed recorder the combination with a receptacle containing a liquid; of a mounted propeller immersed in said liquid, partitions in close proximity thereto, a float with connecting mechanism to a marking point and said point as herein shown and described.

The combination with a liquid contained in a U-shaped receptacle; of amounted propeller immersed in said liquid, stationary partitions above and below said propeller, and a float provided with suitable guides and communicating mechanism therefromto a marking point as herein set forth.

4-. The combination with a receptacle and a contained liquid, said receptacle provided with an inlet, an outlet and an overflow; of a mounted propeller, fixed partitions in said receptacle, a float therein and connecting mechanism therefrom to a marking point as herein set forth.

5. In a speed recorder, the combination with a time movement operatively connected to a toothed feed roll; said roll supported in bearings over the surface of the stationary table and said table; of a float, a contained liquid, connecting mechanism therefrom to a pen holder and pen, so that said float positively moves said pen in either direction and in a straight line, and said pen holder and pen as shown and described.

6. The combination witha suitably mounted screw propeller provided With blades, and means by which it is revolved; of the stationary radial partitions f f f having their edges in proximity to the plane of revolu tion of said blades, and conforming thereto so as to eifect a shear-like motion by the said blades passing the said partitions which are Secured in the cylinder as herein shown and described.

7. The combination with a supported and driven shaft provided with a propeller; of the stationary partitions located in close proximity to said propeller, the whole being immersed in a liquid as shown and for the purpose herein set forth.

8. In a recorder, the supported horizontal bar having a positive rectilinear movement; of a gravity acting pen holder connected thereto and provided at its outer end with a pen and ink-well each separately and independently secured to the said pen holder so that the motions of each are identical, and means whereby said pen is supplied with ink from said well as herein shown and described.

9. In a recorder, the horizontal supporting table, a paper blank provided with a regular series of perforations along one edge of its length, a time movement operatively connected to feed the said blank over the stationary surface of the said table by engagement of the said perforations; in combination with a gravity acting pen and holder connected to a supported bar, said bar having a positive rectilinear movement from and by a float, said float and connecting mechanism to said bar and means whereby said float receives its vertical movement co-incident with the variable motion of the shaft G as herein set forth.

10. In a speed recorder, the combination with a horizontal supported table, a paper blank provided with a regular series of perforations along one edge of its length, a time movement operatively connected to feed the said blank over the stationary surface of said table by engagement of the said perforations; of a gravity acting pen and holder operatively connected to a float, said float and a supporting liquid influenced by the combined action of the propeller and partitions as herein set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 24th day of November, A. D. 1893.

JAMES NAYLOR, JR.

Witnesses:

M. B. MOLAUTHLIN, JOHN A. JOHNSON. 

